Crank attachment for door locks



March 1, 1932. R. VERNOOY 1,847,797

CRANK ATTACHMENT FOR DOOR LOCKS Filed Feb. 11, 1951 Ira 671727: A. Vrn y Patented Mar. 1, 1932 UNITED [STATES PATENT OFFICE 'REINIER VERNOOY, OF UTRECH'I, NETHERLANDS, ASSIGNOR OF 7 ONE-HALF TO J'OHANNES JUSTINUS VAN DEN BERG, OF UTRECHT NETHERLANDS CRANK ATTACHMENT FOR DQOR LOOKS Application filed February 11, 1931, Serial No. 515,085, and in the Netherlands February 14, 1930.

The invention relates to a crank attachment for door locks in which the crank is secured to a pin passing through the lock,

and is supported in a rosette mounted on the door.

In the prior constructions of this type'the rosettes are usually secured by screws in the wood of the door. However, since the wood at the place where the lock is countersunk in the door is but thin, the screws must be very small, so that they soon get'loose and the rosettes are liable to rattling. This is still further promoted by the fact that the square pin is only guided in the door itself and that the cranks often have clearance in the rosettes.

Now the invention consists in this that the crank pin is hollow and is rotatable about a bolt inserted therein and extending outside the rosette in such a manner that by means of the bolt the rosette may be clamped against the door.

In the first place this has the great advantage that the rosettes need not be attached separately by means of screws or other means on the door. Not only much time is saved thereby when assembling the looks, but the danger for loosening of the rosettes is also eliminated.

Secondly the extended bolt supported at its ends in the rosettes offers a long bearing surface to the square pin so that rattling is practically made impossible. This advantage is in particular obtained, when, as is mostly the case, the lock is provided with a crank at either side of the door.

According to the invention a slot may further be made in the wall of the rosette for the passage of the handle of the crank, while the bearing surface of the rosette on the door is of oval or similar oblong shape.

This has the advantage that during assembling the position of the rosette is directly fixed if only care be taken that the slots in 5 the walls of the rosette occupy the correct position with respect to the bearing surface.

exert a pressure at the place where the door is weakened by the inserted lock.

On the accompanying drawings a double crank attachment according to the invention is shown by way of example.

- Fig. 1 is a longitudinal section showing the manner of attaching the cranks and rosettes to the spindle of a latch.

Fig. 2 is a plan view of a rosette.

A square crank pin 1 is provided at either sidewith a crank 2. The hub 3 of each of the cranks is rotatable in the rosette 4.

The crank pin 1 is hollow; a bolt 5 passes through the pin and projects outside the rosettes 4. At its ends the bolt is provided with screw thread and by means of the rings 6 and the nuts 7 the rosettes are'clamped to the door; ornamental nuts constitute an outer enclosure.

The plates 9, which are integral with the rosettes, are provided with a hole 10 for centering the'pin 1.

When delivering the cranks the following parts: rosette, crank, bolt, pin, ring 6 and nuts 7 and 8 at the left in Fig. 1 are delivered as a unit. When assembling, only the parts 'onthe right half of the-said figure have to be mounted. The cranks and the corresponding rosettes may always be held together e. g-

by providing the rosette with a bent edge 11.

In Fig. 2 it has been shown how the bearing surface 11 of the rosette will be preferably shaped and how the slot 13 will be made in the upstanding edge of the rosette for the passage of the crank handle.

I claim:

A crank attachment for door locks, comprising a hollow crank pin passing through and engaging the'lock; cranks secured directly to said hollow pin; rose plates having recesses for receiving the hub portions of said I m ture.

cranks and having slots at their outer edges through which the handle-portionsof said 7 cranks pass outwardly, a bolt passing through the hollow pin, which latter is rotatable z thereon; and nuts screwed on the threaded ends of the bolt, extending outside the rose plates and adapted to press on said plates so as to clamp them against the door.

In testimony whereof I affix my signa- REINIER VER ooY; 

